ci: update image tags to use 'latest_waf' for Docker builds and deployments

[Harsh-Microsoft]

Purpose

This pull request updates the default Docker image tag used throughout the CI/CD workflows and infrastructure deployment scripts from latest to latest_waf. This ensures that all build, deployment, and infrastructure automation consistently reference the latest_waf image version by default, improving clarity and alignment across environments.

CI/CD workflow updates:

• Changed the default Docker image tag from latest to latest_waf in both the build and tagging steps of .github/workflows/build-docker.yml and .github/workflows/ci.yml. This ensures that images built and pushed from the main branch or scheduled events use latest_waf as the tag. [1] [2]

Infrastructure deployment updates:

• Updated the default value of the appversion parameter in infra/main.bicep to latest_waf, and made it configurable via a parameter.
• Added or updated the appversion parameter in both infra/main.parameters.json and infra/main.waf.parameters.json to use the latest_waf image tag from the environment variable, ensuring deployments use the correct image version. [1] [2]

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information

[github-actions]

🎉 This PR is included in version 1.16.0 🎉

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